.page-about {
  --about-axis: 48px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: calc(var(--head-h) + 18px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3.5vw, 40px) 0 clamp(36px, 5vw, 68px);
  border-bottom: 1px solid var(--edge);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: calc(var(--gutter) * -1);
  top: 12%;
  width: clamp(180px, 26vw, 380px);
  height: clamp(180px, 26vw, 380px);
  border: 2px solid var(--edge);
  transform: rotate(45deg);
  opacity: .5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8.4vw, 5.4rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__body {
  margin-top: clamp(24px, 4vw, 44px);
  display: grid;
  gap: 28px;
}

.page-about .about-hero__lead {
  max-width: 60ch;
  font-size: clamp(1rem, 1.6vw, 1.16rem);
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--edge);
  border: 1px solid var(--edge);
}

.page-about .about-fact {
  background: var(--ink-2);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-fact__num {
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__txt {
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--stone);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding: clamp(44px, 6vw, 88px) 0;
  border-bottom: 1px solid var(--edge);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-origin__title {
  margin: 12px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-origin__text p {
  margin: 0 0 1.2em;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--stone);
}

.page-about .about-origin__points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-origin__points li {
  position: relative;
  padding-left: 26px;
  font-size: .94rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-origin__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 14px;
  height: 2px;
  background: var(--green);
}

.page-about .about-origin__fig {
  margin: 0;
}

/* ---------- 赛季纪年时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
  background: var(--ink-2);
  border-bottom: 1px solid var(--edge);
  overflow: hidden;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  opacity: .16;
  pointer-events: none;
}

.page-about .about-timeline__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-timeline > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-tl {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0 0 0 40px;
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--edge);
}

.page-about .about-tl__item {
  position: relative;
}

.page-about .about-tl__marker {
  position: absolute;
  left: -40px;
  top: 6px;
  width: 20px;
  height: 20px;
  border: 2px solid var(--green);
  background: var(--ink);
  transition: background var(--t-mid), border-color var(--t-mid);
}

.page-about .about-tl__card {
  background: var(--ink-3);
  border: 2px solid var(--edge);
  box-shadow: var(--hard);
  padding: 18px 18px 20px;
  transition: border-color var(--t-mid), box-shadow var(--t-mid), transform var(--t-mid);
}

.page-about .about-tl__item:hover .about-tl__card,
.page-about .about-tl__item:focus-within .about-tl__card {
  border-color: var(--blue);
  box-shadow: var(--hard-blue);
  transform: translateX(2px);
}

.page-about .about-tl__item:hover .about-tl__marker,
.page-about .about-tl__item:focus-within .about-tl__marker {
  background: var(--blue);
  border-color: var(--blue);
}

.page-about .about-tl__year {
  margin: 0 0 6px;
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--blue);
}

.page-about .about-tl__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .about-tl__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 档案结构 ---------- */
.page-about .about-archive {
  padding: clamp(44px, 6vw, 88px) 0;
  border-bottom: 1px solid var(--edge);
}

.page-about .about-layers {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  gap: 16px;
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 18px;
  background: var(--ink-2);
  border: 2px solid var(--edge);
  box-shadow: var(--hard);
}

.page-about .about-layer--club {
  border-left-color: var(--green);
}

.page-about .about-layer--match {
  border-left-color: var(--blue);
}

.page-about .about-layer__idx {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--edge);
}

.page-about .about-layer--club .about-layer__idx {
  color: var(--green);
}

.page-about .about-layer--match .about-layer__idx {
  color: var(--blue);
}

.page-about .about-layer__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-layer__text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--stone);
}

.page-about .about-archive__fig {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--ink-2);
  border-bottom: 1px solid var(--edge);
}

.page-about .about-team__grid {
  display: grid;
  gap: 34px;
}

.page-about .section-head--compact .section-head__title {
  margin-top: 10px;
}

.page-about .about-team__tabs {
  margin-top: 26px;
}

.page-about .about-team__panel {
  padding: 20px 18px 22px;
  background: var(--ink-3);
  border: 2px solid var(--edge);
  border-top: none;
}

.page-about .about-team__panel p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.82;
  color: var(--stone);
}

.page-about .about-team__count {
  margin: 0 0 10px !important;
  font-size: .84rem;
  letter-spacing: .08em;
  color: var(--paper) !important;
}

.page-about .about-team__count .num {
  color: var(--blue);
  font-weight: 700;
}

.page-about .about-team__fig {
  margin: 0;
}

/* ---------- 更新流程 ---------- */
.page-about .about-flow {
  padding: clamp(44px, 6vw, 88px) 0;
  border-bottom: 1px solid var(--edge);
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--edge);
  border: 2px solid var(--edge);
}

.page-about .about-step {
  background: var(--ink-2);
  padding: 22px 18px;
  display: grid;
  gap: 8px;
  transition: background var(--t-mid);
}

.page-about .about-step:hover {
  background: var(--ink-3);
}

.page-about .about-step__no {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  color: var(--edge);
  letter-spacing: .02em;
}

.page-about .about-step__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-step__text {
  margin: 0;
  font-size: .91rem;
  line-height: 1.76;
  color: var(--stone);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--ink-2);
  border-bottom: 1px solid var(--edge);
}

.page-about .about-aud {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  gap: 16px;
}

.page-about .about-aud__item {
  position: relative;
  padding: 24px 18px 20px;
  background: var(--ink-3);
  border: 2px solid var(--edge);
  box-shadow: var(--hard);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-aud__item--green {
  border-top: 4px solid var(--green);
}

.page-about .about-aud__item--blue {
  border-top: 4px solid var(--blue);
}

.page-about .about-aud__item--orange {
  border-top: 4px solid var(--orange);
}

.page-about .about-aud__item--clay {
  border-top: 4px solid var(--clay);
}

.page-about .about-aud__num {
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-aud__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-aud__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.76;
  color: var(--stone);
}

.page-about .about-aud__item .tag {
  justify-self: start;
  margin-top: 4px;
}

.page-about .about-audience__more {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-audience__more a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(78, 168, 255, .4);
  transition: border-color var(--t-fast), color var(--t-fast);
}

.page-about .about-audience__more a:hover,
.page-about .about-audience__more a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 运营信息 ---------- */
.page-about .about-legal {
  padding: clamp(44px, 6vw, 88px) 0;
}

.page-about .about-legal__inner {
  display: grid;
  gap: 30px;
}

.page-about .about-legal__title {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.6vw, 2.1rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-legal__body p {
  margin: 0 0 1.1em;
  max-width: 62ch;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--stone);
}

.page-about .about-legal__body a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(78, 168, 255, .4);
}

.page-about .about-legal__body a:hover,
.page-about .about-legal__body a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-about .about-legal__meta {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--edge);
  border: 2px solid var(--edge);
}

.page-about .about-legal__row {
  background: var(--ink-2);
  padding: 14px 16px;
  display: grid;
  gap: 4px;
}

.page-about .about-legal__row dt {
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--stone-2);
}

.page-about .about-legal__row dd {
  margin: 0;
  font-size: .95rem;
  color: var(--paper);
  word-break: break-word;
}

/* ---------- 图片容器微调 ---------- */
.page-about .figure__media {
  overflow: hidden;
  border: 2px solid var(--edge);
  box-shadow: var(--hard);
  background: var(--ink-3);
}

.page-about .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.72) contrast(1.04);
}

.page-about .figure__cap {
  margin-top: 12px;
  font-size: .82rem;
  line-height: 1.62;
  color: var(--stone-2);
}

/* ---------- 标签页样式（页面作用域内） ---------- */
.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  border: 2px solid var(--edge);
  background: var(--edge);
}

.page-about .tabs__btn {
  flex: 1 1 auto;
  min-width: 33%;
  appearance: none;
  border: 0;
  background: var(--ink-2);
  color: var(--stone);
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 13px 10px;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
}

.page-about .tabs__btn:hover {
  color: var(--paper);
}

.page-about .tabs__btn[aria-selected="true"] {
  background: var(--green);
  color: var(--ink);
}

.page-about .tabs__btn:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__card,
  .page-about .about-tl__marker,
  .page-about .about-step,
  .page-about .tabs__btn {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-aud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-legal__meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-layers {
    gap: 20px;
  }

  .page-about .about-layer--season {
    margin-right: 18%;
  }

  .page-about .about-layer--club {
    margin-left: 8%;
    margin-right: 10%;
  }

  .page-about .about-layer--match {
    margin-left: 16%;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-legal__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 56px;
    align-items: start;
  }

  /* 时间轴：左右交错 */
  .page-about .about-tl {
    padding-left: 0;
    gap: 54px;
  }

  .page-about .about-tl::before {
    left: 50%;
    top: 4px;
    bottom: 4px;
    transform: translateX(-1px);
  }

  .page-about .about-tl__item {
    width: calc(50% - var(--about-axis));
  }

  .page-about .about-tl__item:nth-child(odd) {
    justify-self: start;
  }

  .page-about .about-tl__item:nth-child(even) {
    justify-self: end;
  }

  .page-about .about-tl__marker {
    top: 8px;
  }

  .page-about .about-tl__item:nth-child(odd) .about-tl__marker {
    left: auto;
    right: calc(var(--about-axis) * -1 - 10px);
  }

  .page-about .about-tl__item:nth-child(even) .about-tl__marker {
    left: calc(var(--about-axis) * -1 - 10px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-aud {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}